... of course, you can interpret Prickett's theme of metaphorical "double focus" vision in religious terms (cf. "single vision and Newton's sleep" - Blake). Transcendent divinity and incarnate mortality. The eye shifting back & forth, unable to grasp the two-in-one... logos shifting back & forth, yoking & dividing the opposites... cf. Sanford Budick, Dividing muse : images of sacred disjunction in Milton's poetry. Budick contrasts/compares ancient versions of logos (Heraclitus and Philo, Greek & Hebrew) - excellent book.